Muscle biopsy

Muscle biopsy
Micrograph of a muscle biopsy showing ragged red fibers, a finding seen in various types of mitochondrial diseases. Gomori trichrome stain.
ICD-9	15.01
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In medicine, a muscle biopsy is a procedure in which a piece of muscle tissue is removed from an organism and examined microscopically. A muscle biopsy can lead to the discovery of problems with the nervous system, connective tissue, vascular system, or musculoskeletal system.